Gage-cock



Y lowing is a Uhfih S'EATES Parser crricr.

MORGAN MEL'VIN', OF NAGARA FALLS, NEW YORK.

GAGE-COCK.

Vlpplication led July 15, 1919. Serial No. 311,077.

To all/whom t 'may concern: y y

ie it known that l, MORGAN MELVIN, a citizen of the 1United `States of America, residing in the city of Niagara Falls, in the county of Niagara and State of New York, have invented certain new and'useful lmprovements in Gage-Coclrs,of which the folfull, clear, and exact description.

As is known to those skilled in the art, gage cocks must be frequently removed and have the passageway therein reamed and cleaned of all scale and other accumulations. 'Vhen this is donewith the ordinary gage cock` the fires of the boiler must be put out, the steam pressure let off and partof Vthe water drained. Each time such cocks are removed, in order to replace them it is necessary to screw them a little farther'than the position previously occupied, so that, after repeated replacements, the drain spout thereof cannot be made to point in the required direction. i Y

rEhe general object of my invention is to produce gage cock which shall be provided with an auxiliary valve at the extreme inner end thereof and so constructed that the body of the cock may be removed any number of 'times and again attached to the boiler with its drain spout at the same angle.l

Another object of my invention is to provide a gage cock having a flat removable valve seat and one lwhich may be removed while the boiler isvunder its normal pressure.

Furthermore, my device is provided with an auxiliary valve which is positively held open by the valve stem of the device, against a normal tendency to close.

The above objects and advantages have been accomplished by the device shown in the accompanying drawings, of which-4 Figure 1 is a longitudinal, sectional view of my complete device.

Fig. 2 is a fragmentary, sectional view showing the auxiliary valve. f

Fig. 3 is a sectional, plan view taken on line 8-8 of Fig. 2 looking in the direction of the arrows. y y

The body of my device preferably comprises an inner member 5 and an outer member 6 detachable therefrom. These meinbers are held together by a union connection V7 which engages a flange 14 on the inner ,member and is screwthreaded to the detach,-

able outer member wherebythe body parts may assume any desired, relative position; 8 1s the valve stem of the device, which is screw-threaded into the detachable outer member 6 in the usual manner, and provided at its outer end with a hand wheel `9. A, suitable stuffing box with packing 10 is provided for the valve stem. 11 is the valve, which has a flat face and is engageable with a removable flat, valve seat 12, held between the members 5 and 6 of the body. When the members 5 and 6 are detached, the valve seat 12 may be removed or replaced, if vdesired or found necessary. By this construction, grinding of theusual taper-faced valve is obviated. 13 is the drain spout, which is attachedA to or made an'integral part of the detachable member 6 of the body, and whieh may be pointed in any desired direction. f K

The member 5 is provided at its inner end with the usual tapered screw-threadedportion 15 which is screwed into the boiler 16. rThe usual longitudinal passageway 19 is provided through this portion of the body. At the extreme inner end of this portion of the body,y isarranged'the auxiliary valve 17 ofmy device. This auxiliary `valve comprises a valve cage 18 which is held in place preferably by being screw-threaded tov the end of the member 5` A centrally arranged port 2O connects with the passageway 19 of the member 5, and at the outer end of this port is a beveled valve seat 21. 22 is the auxiliary valve which is held in place by the curved portions 28 vof the cage.V 24 is an auxiliaryr valve stem which is screw-thread ed into the auxiliary valve 22 and is slidably supported by the cage18.- A groove'25 `is provided at each sideof the cage, by cutting away the curved surface of the portions 23, so as to permit the auxiliary valve 22 to be moved laterally and in register with the curved portions 23 of the cage when assembling the auxiliaryvvalve parts, which is made possible by a screw connection between the auxiliary valve 22 and its stem 24. A spring 26 is arranged between this auxiliary valve and the cage 18, whereby it has a normal tendencyk to close. Attached to the inner end of the main valve stem 8 is an auxiliary valve stem 27. This auxiliary valve stem extends through the passageways 19 and 20 and bears against the concave .face 28 ,0f the .auxiliary valve 22, This valve stein is of such a length that the auxiliary valve 22 will be held open at all times except when the main valve 11 is moved to its maximumk open position. In this position the auxiliary main valve stem will be withdrawn sufficiently to allow the spring 26 and the steam pressure within the boiler to close the auxiliary valve 22. When this valve is closed, the device may be disasseinbled for cleaning. It will be seen that when the union 7 is unscrewed, the detachable member 6 may be removed. When the detachable member and the valve stem 8 are removed, the auxiliary main valve stem 27 will also be removed, thus permitting the passageway 19 and also the passageway 2O of the auxiliary valve cage to be reamed out its entire length while the boiler is under its normal steam pressure. When the parts are again assembled the -drain spout 13 may be set in its required position and accurately fastened in this position by the union 7 From the foregoing it will be seen that all the parts of the gage cock proper may be removed for cleaning, without having to drain the boiler, thus meeting all the underwriters requirements without any loss of time.

Obviously, some modifications of the details herein shown and described may be made without departing from the spirit of my invention or the scope of the appended claims; and I do not therefore wish to be limited to the exact embodiment herein shown and described, the form hereinbefore described being merely a preferred embodiment thereof.

Having thus described my invention, what I claim is:

1. A gage cock comprising a member having a passageway therethrough and a valveseat and valve, an auxiliary member comprising a valve cage detachably secured to the rst-named member and having a passageway and a valve-seat and valve, means controlled by the operation of the valve of the rst-named member for holding the cage valve open, and means within the valvecage for seating the cage valve when said `for holdingthe cage valve open against a normal tendency to close, and a spring within the valve cage for seating said cage valve when said cage valve is released from said holding means.

3. A gage cock comprising a member having a passagewaytherethrough and a valveseat and valve, a stem extending from said valve through the passageway, an auxiliary member comprising a valve cage detachably secured to the irst-named member and having a passageway and a valve-seat and valve, said cage having guides `for the cage valve, and a spring for seating the cage valve when pressure ot said stem is removed from said cage valve.

4C. Agage-cock comprising an inner member, having a passageway therethrough, an outer -detachable member, a union connection betweenthe members, a removable flat valve seat in the union connection, a valve stem threaded into the outer member and having a flat face main valve engageable with the flat valve seat, an auxiliary valve cage secured to the inner member having a valve seat, a centrally arranged port in line with the passageway, and curved portions having grooves at each side of the` cage, an auxiliary stem attached to the main valve and extending through the passageway and port, an auxiliary valve normally held open by the main valve auxiliary stem, a, valve stem secured to the auxiliary valve and slidable through the end wall of the cage, and a spring in the cage for seating the auxiliary valve when the outer member of the body is detached from the inner member of the body. l

In witness whereof I have hereunto signed my name.

MORGAN MELVIN. 

